CN112375396A - Direct-throwing high-performance nano flame-retardant asphalt modifier and preparation method thereof - Google Patents
Direct-throwing high-performance nano flame-retardant asphalt modifier and preparation method thereof Download PDFInfo
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 119
- 239000010426 asphalt Substances 0.000 title claims abstract description 118
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 239000003607 modifier Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 45
- 239000005060 rubber Substances 0.000 claims abstract description 45
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 34
- 239000002245 particle Substances 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 19
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920006132 styrene block copolymer Polymers 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 239000011159 matrix material Substances 0.000 claims description 12
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 7
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 7
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 7
- 239000000347 magnesium hydroxide Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229940043315 aluminum hydroxide / magnesium hydroxide Drugs 0.000 claims description 6
- SXSTVPXRZQQBKQ-UHFFFAOYSA-M aluminum;magnesium;hydroxide;hydrate Chemical compound O.[OH-].[Mg].[Al] SXSTVPXRZQQBKQ-UHFFFAOYSA-M 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000003431 cross linking reagent Substances 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000010920 waste tyre Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000006477 desulfuration reaction Methods 0.000 claims description 2
- 230000023556 desulfurization Effects 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000002086 nanomaterial Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 3
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 3
- 229910000420 cerium oxide Inorganic materials 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L17/00—Compositions of reclaimed rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a direct-throwing high-performance nano flame-retardant asphalt modifier and a preparation method thereof, wherein the raw materials comprise, by mass, 65-85% of reclaimed rubber powder master batch, 5-15% of butadiene-styrene block copolymer powder particles and 6-12% of nano flame retardant intermediate ZR-Si. The method comprises the steps of mixing a prepared flame retardant intermediate and a reclaimed rubber powder master batch in advance through a mechanochemical reactor, uniformly distributing the nano flame retardant intermediate on the surface of a reclaimed rubber master batch sheet, then granulating by using a steel belt granulator, and bonding butadiene-styrene block copolymer particles when the reclaimed rubber master batch sheet passes through a belt to prepare the direct-throwing high-performance nano flame-retardant asphalt modifier particles with the diameter of 2-4 mm. By directly putting the asphalt mixture into production, the prepared asphalt mixture has high flame-retardant effect, can obviously reduce the flammability of the asphalt in flame, has good flame retardancy and self-extinguishing property, and simultaneously improves the pavement performance of the mixture.
Description
Technical Field
The invention belongs to the field of road asphalt mixture modifiers, and particularly relates to a direct-throwing high-performance nano flame-retardant asphalt modifier and a preparation method thereof.
Background
Asphalt is an organic high molecular material and has obvious flammability. The combustion of bitumen is also a complex physicochemical process of heat release and decomposition, in which hydrogen, methane, benzene and alkane combustible gases are decomposed. The combustion of these gases further accelerates the thermal decomposition of asphalt, so that the asphalt fire is characterized by its violent trend, quick expansion, wide range and large loss. When major traffic accidents happen in the semi-closed tunnel, asphalt can be dissolved or partially dissolved in exposed gasoline, kerosene, diesel oil or other organic solvents to participate in the combustion process, a large amount of smoke is generated immediately, rescue is seriously affected, and life and property losses of people are aggravated. In recent years, fire prevention and disaster prevention of large tunnels are generally emphasized by major casualty accidents caused by fire disasters in domestic and foreign tunnels, and a layer of shadow is covered on the popularization of tunnel asphalt pavements. According to statistics, the rate of fire accidents in the highway tunnel is about 0.5 per 1 hundred million kilometers. Although the probability of fire occurrence in the tunnel is low, the fire consequences are serious, especially in long and large road tunnels. Therefore, it is necessary to successfully and effectively perform flame retardant modification on the asphalt of the tunnel asphalt pavement, and the important engineering and practical significance is achieved.
After a long period of development, the flame retardant science of high molecular materials has been developed into a rather mature subject, the asphalt flame retardant at the present stage is mainly added with aluminum hydroxide, and the existing engineering application shows that the aluminum hydroxide has good flame retardant effect, however, the mixing amount requirement is high, which inevitably increases the cost of the flame retardant asphalt and greatly weakens the performance of the asphalt mixture, especially the low temperature and water stability of the asphalt mixture. Therefore, new flame retardant technologies are needed.
With the development of nanotechnology, nano flame retardant systems have emerged and developed rapidly. Compared with the traditional flame retardant, the nanometer flame retardant system has the most obvious characteristics that the combustion characteristic of the material can be obviously reduced only by adding a very small amount of the nanometer flame retardant system, and the mechanical property of the material can be improved. In the nanometer flame-retardant material, the technology of nanometer aluminum hydroxide is mature gradually. However, the use of nano materials in asphalt materials has the problems of difficult dispersion and the like, and is easy to cause agglomeration and the like.
The invention discloses a nano asphalt flame-retardant smoke-suppression modifier and a preparation method thereof, wherein the modifier comprises 25-40 parts of nano layered magnesium hydroxide, 5-15 parts of nano cerium oxide, 5-20 parts of melamine, 35-50 parts of polyolefin, 1-10 parts of a coupling agent and 5-10 parts of a compatibilizer through retrieval. The invention discloses a method for preparing an asphalt flame-retardant modifier. The asphalt flame-retardant modifier has the characteristics of good dispersibility, easy addition, safety and the like, and takes the nano layered magnesium hydroxide as a flame retardant and the nano cerium oxide as a smoke suppressant, so that the flame-retardant and smoke-suppressant performance of the system can be increased while the environment is protected, the consumption of the flame retardant is reduced, the mechanical property of the asphalt is improved, and multiple effects of flame retardance, smoke suppression and enhancement are realized.
In combination with the existing research results and the existing main problems, the existing tunnel flame-retardant asphalt mixture needs to overcome the problems of reducing the mixing amount of the flame retardant, ensuring the flame-retardant effect, having good economy and the like, and in addition, the pavement performance of the asphalt mixture is very urgent to be maintained or improved to a certain extent. Therefore, the invention provides a direct-throwing high-performance nano flame-retardant asphalt modifier, which utilizes the characteristic that the specific surface area of a nano material is far larger than that of a common flame-retardant material, reduces the dosage of a flame retardant, and simultaneously utilizes reclaimed rubber and butadiene-styrene block copolymer particles to improve the dosage of flame-retardant asphalt.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention aims to provide a direct-vat type high-performance nano flame-retardant asphalt modifier, which is based on the characteristics that the specific surface area of nano flame-retardant particles is large, the flame-retardant effect is more obvious than that of similar non-nano materials, but the nano flame-retardant asphalt modifier is difficult to disperse in asphalt, and the like, and the modified asphalt master batch is taken as a carrier to prepare the direct-vat type high-performance nano flame-retardant asphalt modifier, so that the uniform dispersion of nano flame-retardant asphalt is realized, and the flame-retardant effect of the flame-retardant asphalt and the road performance.
The invention is realized by constructing a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; based on the weight of the direct-throwing high-performance nano flame-retardant asphalt modifier, the raw materials of the modifier comprise 65-85 wt% of regenerated rubber powder master batch, 5-15 wt% of butadiene-styrene block copolymer powder particles and 6-12 wt% of nano flame retardant intermediate ZR-Si.
The invention relates to a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; the reclaimed rubber powder master batch is prepared from the following raw materials: based on the weight of the composition, 30-80 wt% of matrix asphalt, 20-40 wt% of reclaimed rubber powder and 5-10 wt% of cross-linking agent.
The invention relates to a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; the regenerated rubber powder master batch is prepared by the method comprising the following steps: and shearing and mixing the regenerated rubber powder and the matrix asphalt, and then adding a cross-linking agent to obtain a stable regenerated rubber powder master batch.
The invention relates to a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; the matrix asphalt is one or more selected from natural asphalt, petroleum asphalt and tar asphalt; the matrix asphalt is Bilong 70# A-grade matrix asphalt.
The invention relates to a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; the temperature of the shearing and mixing is 140-170 ℃, and the time is preferably 1-3 hours.
The invention relates to a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; the regenerated rubber powder is prepared from waste tires such as truck tires with the section width of 900-1200 inches by a normal temperature grinding method, and the rubber powder obtained by a desulfurization regeneration technology has the particle size of 30-100 meshes.
The invention relates to a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; the weight average molecular weight of the butadiene styrene block copolymer powder particles is 120000-300000 g/mol, and the particle size is 80-120 meshes, so that the pavement performance of the flame-retardant asphalt mixture is further improved; in addition, the butadiene-styrene block copolymer powder particles are bonded to the regenerated rubber powder master batch, so that the bonding between the master batches can be reduced, and the construction operability of the regenerated rubber powder composite nano flame-retardant intermediate is improved.
The invention relates to a direct-throwing high-performance nano flame-retardant asphalt modifier which is characterized in that; the fire retardant intermediate ZR-Si is one or a mixture of nano aluminum hydroxide or magnesium hydroxide and is obtained by performing surface activity treatment according to the following treatment process:
(1) diluting a silane coupling agent into 20% of treatment liquid by using ethanol as a solvent;
(2) placing the nano aluminum hydroxide/magnesium hydroxide in an oven at 100 ℃ for 2 hours at constant temperature, and cooling to room temperature;
(3) then soaking the nano aluminum hydroxide/magnesium hydroxide in the treatment solution at normal temperature, and slightly stirring for 3 hours by using a stirrer;
(4) and finally, drying the mixture for 2 hours at the temperature of 60 ℃, and cooling the mixture to room temperature to obtain the asphalt flame retardant modifier ZR-Si.
The treated nano flame-retardant particles can improve the compatibility between the nano flame-retardant particles and asphalt, reduce the polarity difference between organic and inorganic substances and further improve the uniformity and pavement performance of the flame-retardant asphalt mixture.
A preparation method of a direct-throwing high-performance nano flame-retardant asphalt modifier is characterized by comprising the following steps: firstly, mixing a flame retardant intermediate and a reclaimed rubber powder master batch through a mechanochemical reactor to ensure that the nano flame retardant intermediate is uniformly distributed on the surface of a reclaimed rubber master batch sheet, then granulating by using a steel belt granulator, and adhering butadiene-styrene block copolymer particles when the reclaimed rubber master batch passes through a belt to prepare the direct-throwing high-performance nano flame-retardant asphalt modifier particles with the diameter of 2-4 mm.
The invention has the following advantages: a direct-throwing high-performance nano flame-retardant asphalt modifier and a preparation method thereof are implemented, wherein the direct-throwing high-performance nano flame-retardant asphalt modifier comprises 65-85 wt% of regenerated rubber powder master batch, 5-15 wt% of butadiene-styrene block copolymer powder particles and 6-12 wt% of nano flame retardant intermediate ZR-Si. The method comprises the steps of mixing a prepared flame retardant intermediate and a reclaimed rubber powder master batch in advance through a mechanochemical reactor, uniformly distributing the nano flame retardant intermediate on the surface of a reclaimed rubber master batch sheet, then granulating by using a steel belt granulator, and bonding butadiene-styrene block copolymer particles when the reclaimed rubber master batch sheet passes through a belt to prepare the direct-throwing high-performance nano flame-retardant asphalt modifier particles with the diameter of 2-4 mm. By directly putting the asphalt mixture into production, the prepared asphalt mixture has high flame-retardant effect, can obviously reduce the flammability of the asphalt in flame, has good flame retardancy and self-extinguishing property, and simultaneously improves the pavement performance of the mixture.
Detailed Description
The present invention will be described in detail with reference to embodiments, and technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a direct-throwing high-performance nano flame-retardant asphalt modifier by improving the characteristics that the specific surface area of nano flame-retardant particles is large, the flame-retardant effect is more obvious than that of similar non-nano materials, but the direct-throwing high-performance nano flame-retardant asphalt modifier is difficult to disperse in asphalt and the like, and the direct-throwing high-performance nano flame-retardant asphalt modifier is prepared by taking modified asphalt master batch as a carrier, so that the uniform dispersion of nano flame-retardant asphalt is realized, and the flame-retardant effect of the flame-retardant asphalt and the pavement performance of a mixture of the flame-retardant asphalt are.
The direct-throwing high-performance nano flame-retardant asphalt modifier comprises the following specific examples:
(1) by weight, 100g of matrix asphalt, 50g of regenerated rubber powder obtained by degrading 40-mesh tire rubber powder by a screw and 15g of sulfur cross-linking agent are weighed. And then, heating the matrix asphalt to 160 ℃, then slowly adding the regenerated rubber powder, after the regenerated rubber powder is completely added, increasing the shearing rate to 5000r/min, changing a stirrer after shearing for 90min, and then slowly adding the sulfur cross-linking agent.
(2) Carrying out surface active treatment on the nano aluminum hydroxide according to the following treatment process:
A. diluting a silane coupling agent into 20% of treatment liquid by using ethanol as a solvent;
B. placing the nano aluminum hydroxide/magnesium hydroxide in an oven at 100 ℃ for 2 hours at constant temperature, and cooling to room temperature;
C. then soaking the nano aluminum hydroxide/magnesium hydroxide in the treatment solution at normal temperature, and slightly stirring for 3 hours by using a stirrer;
D. and finally, drying the mixture for 2 hours at the temperature of 60 ℃, and cooling the mixture to room temperature to obtain a nano flame retardant modifier intermediate ZR-Si.
When in implementation; the raw materials comprise 65-85 wt% of regenerated rubber powder master batch, 5-15 wt% of butadiene styrene block copolymer powder particles and 6-12 wt% of nano flame retardant intermediate ZR-Si.
(3) Then mixing 10 wt% of flame retardant intermediate and 80 parts of reclaimed rubber powder master batch through a mechanochemical reactor by weight to ensure that the nano flame retardant intermediate is uniformly distributed on the surface of a reclaimed rubber master batch sheet, then granulating by using a steel belt granulator, and bonding 10 wt% of butadiene-styrene block copolymer particles when the particles pass through a belt to prepare the direct-throwing high-performance nano flame-retardant asphalt modifier particles with the diameter of 2-4 mm.
Compared with the background technology, the invention has the following improvements and advantages:
the method comprises the following steps of 1: the materials used in the patent of Changsha engineering (a nano asphalt flame-retardant smoke-suppressing modifier and preparation thereof) are all nano aluminum hydroxide/magnesium with layered characteristics, and after the nano asphalt flame-retardant smoke-suppressing modifier and SBS or EVA are prepared and molded by a screw extruder, no data shows that the nano asphalt flame-retardant smoke-suppressing modifier can be directly put into the stirring process of an asphalt mixture by a dry method, and the preparation of modified asphalt still needs to be carried out by a wet method. The application is through the preparation of modified asphalt master batch, and the master batch possesses the characteristic of instant dissolving in the asphalt mixture. Therefore, the asphalt mixture is directly used during mixing, and the use objects and scenes of longer Saniculture patents are obviously different.
The method comprises the following steps of 2: the method for preparing the nano asphalt flame-retardant smoke-suppressing modifier in the Changsha chemical patent (a nano asphalt flame-retardant smoke-suppressing modifier and a preparation method thereof) comprises the following steps: and fully mixing the dried nano layered magnesium hydroxide, the dried nano cerium oxide, the dried melamine, the dried coupling agent and the dried compatibilizer and one or more of polyethylene, EVA (ethylene vinyl acetate) or SBS (styrene butadiene styrene), and adding the mixture into a double-screw extruder for extrusion molding. The high-speed mixing adopted here only shows that organic and inorganic substances are uniformly mixed, the screw extrusion process is a granulation requirement, and no evidence shows that a chemical reaction exists in the process, but the regenerated rubber powder master batch and the active nano aluminum/magnesium hydroxide are subjected to mechanochemical action by the internal mixer, so that lipophilic groups in the active nano aluminum/magnesium hydroxide and the regenerated rubber powder master batch can be subjected to a chemical reaction, the compatibility characteristics of the organic and inorganic substances are improved, and materials such as a compatibilizer and the like are saved.
The invention has the advantages and beneficial technical effects as follows:
(1) the invention adopts the nano flame retardant, utilizes the characteristic that the specific surface area of the nano flame retardant is far larger than that of a common material, can realize the flame retardant characteristic of asphalt under the condition of lower mixing amount, and improves the safety characteristic of tunnel pavement.
(2) According to the direct-throwing high-performance nano flame-retardant asphalt modifier, the regenerated rubber powder master batch and the butadiene-styrene block copolymer powder particles can realize the modification of the asphalt performance and realize a polymer network in the asphalt, so that the pavement performance of the flame-retardant asphalt mixture is further improved.
(3) The direct-throwing high-performance nano flame-retardant asphalt modifier provided by the invention uses a flame retardant intermediate ZR-Si which is subjected to surface activity treatment, so that the compatibility between the asphalt modifier and the flame retardant can be improved, the polarity difference between organic and inorganic substances is reduced, and the storage stability of the flame retardant is improved.
(4) The direct-throwing high-performance nano flame-retardant asphalt modifier adopted by the invention has the characteristics of large using and operating space, use of raw materials of waste tires, economy and environmental protection.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A direct-throwing high-performance nano flame-retardant asphalt modifier is characterized in that; based on the weight of the direct-throwing high-performance nano flame-retardant asphalt modifier, the raw materials of the modifier comprise 65-85 wt% of regenerated rubber powder master batch, 5-15 wt% of butadiene-styrene block copolymer powder particles and 6-12 wt% of nano flame retardant intermediate ZR-Si.
2. The direct-vat-set high-performance nano flame-retardant asphalt modifier according to claim 1, characterized in that; the reclaimed rubber powder master batch is prepared from the following raw materials: based on the weight of the composition, 30-80 wt% of matrix asphalt, 20-40 wt% of reclaimed rubber powder and 5-10 wt% of cross-linking agent.
3. The direct-vat-set high-performance nano flame-retardant asphalt modifier according to claim 1 or 2, characterized in that; the regenerated rubber powder master batch is prepared by the method comprising the following steps: and shearing and mixing the regenerated rubber powder and the matrix asphalt, and then adding a cross-linking agent to obtain a stable regenerated rubber powder master batch.
4. The direct-vat-set high-performance nano flame-retardant asphalt modifier according to claim 2, characterized in that; the matrix asphalt is one or more selected from natural asphalt, petroleum asphalt and tar asphalt; the matrix asphalt is Bilong 70# A-grade matrix asphalt.
5. The direct-vat-set high-performance nano flame-retardant asphalt modifier according to claim 3, characterized in that; the temperature of the shearing and mixing is 140-170 ℃, and the time is preferably 1-3 hours.
6. The direct-vat-set high-performance nano flame-retardant asphalt modifier according to claim 2 or 3, characterized in that; the regenerated rubber powder is prepared from waste tires such as truck tires with the section width of 900-1200 inches by a normal temperature grinding method, and the rubber powder obtained by a desulfurization regeneration technology has the particle size of 30-100 meshes.
7. The direct-vat-set high-performance nano flame-retardant asphalt modifier according to claim 1, characterized in that; the weight average molecular weight of the butadiene styrene block copolymer powder particles is 120000-300000 g/mol, and the particle size is 80-120 meshes, so that the pavement performance of the flame-retardant asphalt mixture is further improved; in addition, the butadiene-styrene block copolymer powder particles are bonded to the regenerated rubber powder master batch, so that the bonding between the master batches can be reduced, and the construction operability of the regenerated rubber powder composite nano flame-retardant intermediate is improved.
8. The direct-vat-set high-performance nano flame-retardant asphalt modifier according to claim 1, characterized in that; the fire retardant intermediate ZR-Si is one or a mixture of nano aluminum hydroxide or magnesium hydroxide and is obtained by performing surface activity treatment according to the following treatment process:
(1) diluting a silane coupling agent into 20% of treatment liquid by using ethanol as a solvent;
(2) placing the nano aluminum hydroxide/magnesium hydroxide in an oven at 100 ℃ for 2 hours at constant temperature, and cooling to room temperature;
(3) then soaking the nano aluminum hydroxide/magnesium hydroxide in the treatment solution at normal temperature, and slightly stirring for 3 hours by using a stirrer;
(4) finally, drying the mixture for 2 hours at the temperature of 60 ℃, and cooling the mixture to room temperature to obtain the asphalt flame retardant modifier ZR-Si;
the treated nano flame-retardant particles can improve the compatibility between the nano flame-retardant particles and asphalt and reduce the organic and inorganic properties.
9. A preparation method of a direct-throwing high-performance nano flame-retardant asphalt modifier is characterized by comprising the following steps: firstly, mixing a flame retardant intermediate and a reclaimed rubber powder master batch through a mechanochemical reactor to ensure that the nano flame retardant intermediate is uniformly distributed on the surface of a reclaimed rubber master batch sheet, then granulating by using a steel belt granulator, and adhering butadiene-styrene block copolymer particles when the reclaimed rubber master batch passes through a belt to prepare the direct-throwing high-performance nano flame-retardant asphalt modifier particles with the diameter of 2-4 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230226A (en) * | 2021-12-28 | 2022-03-25 | 南京兴佑交通科技有限公司 | High-density thin-layer asphalt pavement additive and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709123A (en) * | 2009-12-27 | 2010-05-19 | 长沙理工大学 | Nano asphalt flame-retardant smoke inhibition modifying agent and preparation thereof |
| CN102167545A (en) * | 2010-12-31 | 2011-08-31 | 彭麒桦 | Low-temperature smokeless flame-retardant pavement material for tunnel and preparation method thereof |
| CN202265513U (en) * | 2011-06-09 | 2012-06-06 | 深圳市天坤元环保科技有限公司 | Smokeless anti-flaming road-surface material for low-temperature tunnel |
| CN105384387A (en) * | 2015-12-28 | 2016-03-09 | 吉林省交通规划设计院 | Composite flame retardant and preparation method and application thereof |
-
2020
- 2020-11-30 CN CN202011370951.XA patent/CN112375396A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709123A (en) * | 2009-12-27 | 2010-05-19 | 长沙理工大学 | Nano asphalt flame-retardant smoke inhibition modifying agent and preparation thereof |
| CN102167545A (en) * | 2010-12-31 | 2011-08-31 | 彭麒桦 | Low-temperature smokeless flame-retardant pavement material for tunnel and preparation method thereof |
| CN202265513U (en) * | 2011-06-09 | 2012-06-06 | 深圳市天坤元环保科技有限公司 | Smokeless anti-flaming road-surface material for low-temperature tunnel |
| CN105384387A (en) * | 2015-12-28 | 2016-03-09 | 吉林省交通规划设计院 | Composite flame retardant and preparation method and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| 叶伟: ""隧道抑烟沥青的研制与抑烟沥青混合料路用性能研究"", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅱ辑》 * |
| 李楷主编: "《新型防水材料质量检测标准与应用技术规范实用手册卷2》", 31 March 2004, 安徽文化音像出版社 * |
| 杨医博等主编: "《土木工程材料》", 31 December 2016, 华南理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230226A (en) * | 2021-12-28 | 2022-03-25 | 南京兴佑交通科技有限公司 | High-density thin-layer asphalt pavement additive and preparation method thereof |
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